Malicious PDF — malware analysis report

Static analysis result for SHA-256 327bf014b508dc59…

MALICIOUS

PDF

45.5 KB Created: 2020-08-16 17:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5071d71212a74e41a533a29285af4bf SHA-1: 12d40daf80c7f6ebe5102323a96eba6c1ecfdf9b SHA-256: 327bf014b508dc59cf780862f36167166b1c0bfe91f393660fc7547669934355
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, masquerading as various technical documents. One prominent link, 'https://ttraff.ru/pify?keyword=anydesk+for+linux', is flagged as a malicious redirector. The document body and heuristics indicate a lure to install remote support tools like AnyDesk, suggesting a social engineering attack to gain initial access or facilitate further compromise. The presence of a malicious redirector URL is a high-confidence indicator of malicious intent.

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=anydesk+for+linux
    • http://files.danhanes.com/uploads/1/3/1/3/131398091/fc7ed634ae101.pdf
    • http://files.unitykcnorth.org/uploads/1/3/1/6/131606260/puvagu_jikanajuna_dumevefik.pdf
    • http://gopijate.harvestupc.com/uploads/1/3/1/3/131398101/zajifi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8048/2967/files/vehicle_tracking_system_using_arduino.pdf
    • https://cdn.shopify.com/s/files/1/0435/2344/0799/files/97563563061.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7961/files/multi_camera_calibration_github.pdf
    • https://cdn.shopify.com/s/files/1/0436/7358/3781/files/gogazirawivinuvadaset.pdf
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/51921876382.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7961/files/payroll_management_system_literature_review.pdf
    • https://cdn.shopify.com/s/files/1/0432/3767/1080/files/jafup.pdf
    • https://cdn.shopify.com/s/files/1/0436/7728/6565/files/pdf_of_marketing_management_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7112/files/ruwejifebajelopolote.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0296/files/14673279767.pdf
    • https://cdn.shopify.com/s/files/1/0428/8934/7228/files/sc_buyer_agency_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/gixukin.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6693/files/jiwozepukobisoto.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068fd.bin
1d8c6a5b0d3151d9c658bcee02576dd093feadfdb5ff7c3ba7f0785448e5a199
pdf-font-stream PDF embedded font (sfnt) at offset 0x68FD 4916 bytes
font_01_sfnt_off000079d1.bin
0a2ab6a24403547a38e1c21cee6f54bcd38a0e9c0cc97aa4f358e478dd2019bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x79D1 14992 bytes